octave

I'm using Octave 3.8 on Ubuntu 13.10 and "fltk" for graphics is not working well. So I always switch to "gnuplot" by commanding: graphics_toolkit("gnuplot") How can I configure Octave to use "gnuplot" by default? You add the command to your .octaverc file. For more info: http://www.gnu.org/software/octave/doc/interpreter/Startup-Files.html You can add that line to the .octaverc file. If the files does not exist, just create it on your home directory. This file is executed every time you start Octave unless you pass the -f or --norc option. You can add many other things to you .octaverc file.

I installed Octave via Homebrew using the instructions given here . When I try to generate a plot, I get the following message: Fontconfig error: Cannot load default config file warning: could not match any font: *-normal-normal-10 warning: called from axes at line 66 column 10 gca at line 58 column 9 newplot at line 148 column 8 surf at line 70 column 9 sombrero at line 65 column 5 I then get a long series of the following messages: warning: ft_render: unable to load appropriate font warning: could not match any font: *-normal-normal-10 Usually the plot appears once, but if I call it again

For my lab experiments I write small programs to help with the data analysis. I usually just need basic calculations, means, standard deviation, arbitrary weighted function fitting and plots with errorbars and fitted function. With GNU Octave, I can do this. I started to read more into the language of it and I start to not like its inconsistencies and that I have to learn yet another language. So I am thinking about using Python, which I am using for a while now, with SciPy and NumPy. Can I do those things with Python easily or is it more overhead to get the general purpose language Python to

I use Octave with gnuplot under Windows. I can zoom in using the right mouse button. But how can I zoom out from the UI? I found this post on Nabble . Pressing p takes you to the previous zoom level, n to the next level, and u unzooms. I pressed h in a gnuplot window outside of Octave and got this command list: 2x<B1> print coordinates to clipboard using `clipboardformat` (see keys '3', '4') <B2> annotate the graph using `mouseformat` (see keys '1', '2') or draw labels if `set mouse labels is on` <Ctrl-B2> remove label close to pointer if `set mouse labels` is on <B3> mark zoom region (only

We are a medium-sized academic research lab whose main outputs are new statistical methods for analyzing large datasets. We generally develop in R and MATLAB/Octave. We would like to expand the reach of our work by building simple, wizard-style user interfaces to access our methods, either web-apps like RNAfold or stand-alone applications to analyze private data. Ideally, we would like the interfaces to do some data checking, to only use FOSS, to run in Mac and Windows environments, and to be able to generate simple charts and graphs that can be output as figures suitable for publication. Also

I'm trying to convert a color image from rgb to hsv (make changes) then back to rgb. As a test I made this code just to test how to go from rgb to hsv back to rgb but when I view the image it just shows up as black. What am I missing? *PS I'm using octave 3.8.1 which works like matlab Here are the octave 3.8.1 packages I have loaded: >>> pkg list Package Name | Version | Installation directory --------------+---------+----------------------- control *| 2.6.2 | /usr/share/octave/packages/control-2.6.2 general *| 1.3.4 | /usr/share/octave/packages/general-1.3.4 geometry *| 1.7.0 | /usr/share

I have 8x8 matrix where I have 15 diagonals. upper left corner “diagonal 1” and the lower right corner “diagonal 15”. I want to zero out the specific sets of diagonals like {9, 10, 11, 12, 13, 14, 15} or {5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15}. Anyone please give me solution? I believe you can use: M = M - diag(diag(M,k),k); where k is 0 for the main diagonal, negative for the lower diagonals (up to -7), positive for the upper diagonals (up to 7). EDIT: My bad, this only zero out one of the diagonal of your choice. You can repeat the process for all the diagonals you want to zero out but that